HubSpot vs Klaviyo

HubSpot and Klaviyo both appear on the Smoower Developer Ecosystem Index.

HubSpot (rank #93) holds a narrow lead over Klaviyo (rank #237) on the overall Smoower ecosystem score (56 vs 48). The gap of 8 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), HubSpot is slightly ahead of Klaviyo. On education (docs, guides and learning material for developers), Klaviyo is slightly ahead of HubSpot. On community (issue response, PR reviews and discussion health), Klaviyo is ahead of HubSpot. On reach (how visible the ecosystem is beyond its own repos), HubSpot is clearly ahead of Klaviyo. On momentum (release cadence and how fast the ecosystem moves), HubSpot is ahead of Klaviyo.

HubSpot carries 53,481 GitHub stars across 381 public repos, with 35 repositories active in the last 90 days and 4 external contributors on record. Klaviyo shows 573 stars across 117 public repos, 23 active in the last 90 days and 17 external contributors. The star gap on its own does not decide the comparison, but HubSpot's footprint is roughly 93.3x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

HubSpot is the stronger read for anyone weighting reach. Klaviyo looks better where community is the deciding factor. The table below breaks the scores down pillar by pillar; the linked profiles cover the underlying repos, docs and community signals in full.